US20060276183A1 - Reliable reception of broadcast/multicast content - Google Patents

Reliable reception of broadcast/multicast content Download PDF

Info

Publication number
US20060276183A1
US20060276183A1 US11/504,236 US50423606A US2006276183A1 US 20060276183 A1 US20060276183 A1 US 20060276183A1 US 50423606 A US50423606 A US 50423606A US 2006276183 A1 US2006276183 A1 US 2006276183A1
Authority
US
United States
Prior art keywords
data source
recited
segments
means
retrieving
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
US11/504,236
Other versions
US8463250B2 (en
Inventor
Roy Franklin Quick
Raymond Hsu
Michael-David Nakayoshi Canoy
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qualcomm Inc
Original Assignee
Qualcomm Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to US10/439,594 priority Critical patent/US7113773B2/en
Application filed by Qualcomm Inc filed Critical Qualcomm Inc
Priority to US11/504,236 priority patent/US8463250B2/en
Publication of US20060276183A1 publication Critical patent/US20060276183A1/en
Assigned to QUALCOMM INCORPORATED reassignment QUALCOMM INCORPORATED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CANOY, MICHAEL-DAVID NAKAYOSHI, HSU, RAYMOND T., QUICK, ROY FRANKLIN, JR.
Application granted granted Critical
Publication of US8463250B2 publication Critical patent/US8463250B2/en
Application status is Active legal-status Critical
Adjusted expiration legal-status Critical

Links

Images

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18Automatic repetition systems, e.g. van Duuren system ; ARQ protocols
    • H04L1/1867Arrangements specific to the transmitter end
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18Automatic repetition systems, e.g. van Duuren system ; ARQ protocols
    • H04L1/1829Arrangements specific to the receiver end
    • H04L1/1835Buffer management
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L2001/0092Error control systems characterised by the topology of the transmission link
    • H04L2001/0093Point-to-multipoint
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/40Connection management for selective distribution or broadcast

Abstract

Systems and methods for systems and methods for reliably broadcasting content to a plurality of users and facilitating distribution of portions of the broadcast content that either were not received by particular users, or were received with errors. In one embodiment, a wireless communication system is configured to broadcast content from a content source to a plurality of user devices. The content source is configured to provide the content to a base station. The base station parses the content into a plurality of segments and associates sequential identifiers with each of the segments. The content is then broadcast to each of the user devices. An identifier of an alternative data source is also provided to the user devices. When a mobile station receives the segments, it examines the segment identifiers to identify missing segments. The segments are then retrieved from the alternative data source identified by the base station.

Description

    CLAIM OF PRIORITY UNDER 35 U.S.C. §120
  • The present Application for Patent is a Continuation and claims priority to patent application Ser. No. 10/439,594 entitled “RELIABLE RECEPTION OF BROADCAST/MULTICAST CONTENT” filed May 16, 2003, now allowed, and assigned to the assignee hereof and hereby expressly incorporated by reference herein.
  • BACKGROUND
  • 1. Field
  • The present invention relates generally to broadcast communications and more particularly to systems and methods for providing improved reliability in broadcast and/or multicast communications.
  • 2. Related Art
  • Wireless communications are widely used for a vast array of applications. For example, wireless communications systems are used to provide mobile telephone access, paging capabilities and satellite communications. One of the most familiar applications of wireless technologies is in cellular telephone systems. As used herein, the term “cellular” is used to refer generically to wireless telephone systems, including cellular, PCS, and any other systems.
  • Cellular telephone systems have expanded from simply carrying voice communications to carrying voice and data, to providing high-speed data transfers for applications such as internet access. Various wireless interfaces have been developed for such cellular telephone systems including frequency division multiple access (FDMA), time division multiple access (TDMA), and code division multiple access (CDMA).
  • Assorted standards have also been developed for wireless communications, including Advanced Mobile Phone Service (AMPS), Global System for Mobile (GSM), and Interim Standard 95 (IS-95). IS-95 and its derivatives, such as IS-95A, IS-95B (often referred to collectively as IS-95), ANSI J-STD-008, IS-99, IS-2000, IS-657, IS-707, and others, are promulgated by the Telecommunication Industry Association (TIA) and other well known standards bodies.
  • Information which is transmitted using wireless communications systems is typically formatted into discrete groupings of data, each of which can be transmitted over a short period of time. These groupings of data may be referred to by various terms, including data packets, data frames, or simply packets or frames. When data (e.g., a data stream) is to be transmitted, it is broken down into pieces that are formatted into frames. The frames are typically transmitted individually over a wireless communication channel, checked to ensure that the frames have been accurately transmitted, and reassembled to form the original data stream.
  • Various techniques have been developed to allow receiving devices to verify the integrity of transmitted frames (i.e., to determine whether any errors occurred in the transmission of the frames). For example, each packet may contain a check value such as a CRC (cyclic redundancy check) value. The check value is computed based on the contents of the frame and is inserted into the frame prior to transmission. The check value of the received frame is then checked against the frame contents to determine whether the value accurately corresponds to the contents. If so, then the frame is determined to be free of errors.
  • While the use of check values can be used to ensure data integrity, it does not address the problem of frames that are dropped during transmission (as opposed to being received with errors). If a frame is not received, the check value clearly cannot be used to identify the error (the fact that the frame was dropped). Other mechanisms have therefore been developed to identify frames that are missing from the received data. One such mechanism is the radio link protocol (RLP).
  • RLP is used to control frame re-transmissions when one or more frames are not successfully received (i.e., that are dropped or that contain errors). RLP determines how and when the frames are re-transmitted. One of the primary features of RLP is the inclusion of a sequence number in the header of each frame that is transmitted. Because each frame has a sequence number, the receiving device knows that the received frames should contain a continuous series of sequence numbers. If a sequence number is missing, then the corresponding frame is missing. Consequently, if the receiving device detects a missing sequence number, it transmits a request to the transmitting device to re-send the frame with the missing sequence number. The receiving device may request re-transmission a number of times. If the frame is still not successfully received, the receiving device may ignore the missing frame.
  • RLP was developed to address the problem of missing frames in point-to-point transmissions of data. This type of re-transmission scheme is impractical in a broadcast communication system, however, because there is a potentially large number of receiving devices that may request re-transmission of frames that are missing or that contain errors. Even if there were relatively few re-transmission requests, the overall performance of a broadcast system would suffer if a broadcast had to be interrupted to service the re-transmission requests of a small number of receivers. It would therefore be desirable to provide a mechanism for servicing these requests without degrading the performance of the broadcast system.
  • SUMMARY OF THE INVENTION
  • One or more of the problems outlined above may be solved by the various embodiments of the invention. Broadly speaking, the invention comprises systems and methods for reliably broadcasting content to a plurality of users and facilitating distribution of portions of the broadcast content that were not received by particular users, or which were received with errors.
  • In one embodiment, a wireless communication system is configured to broadcast content from a content source to a plurality of user devices. The content source is configured to provide the content in a plurality of segments and to provide sequential identifiers associated with each of the segments. The content is then transmitted to each of the user devices via a broadcast channel of the wireless communication system. In addition to the broadcast content, the system also transmits to the user devices an identifier of a data source from which missing segments of the broadcast data can be retrieved. When the segments are received by the user devices, they are examined to determine whether all of the sequential segment identifiers were received (i.e., whether there are gaps in the sequence of identifiers). If any segments are missing, the respective user device retrieves the missing segment(s) from the data source identified by the system. Segments that are identified as containing errors can be retrieved in the same manner.
  • An alternative embodiment of the invention may comprise a method implemented on the transmitting side of a broadcast link (e.g., in a broadcast station). In this embodiment, the method comprises formatting broadcast content into multiple segments, associating sequential segment identifiers with each of the segments, broadcasting the segments and associated segment identifiers to multiple receivers, and providing to the receivers an identifier of a source from which the receivers can retrieve segments of the broadcast that are not successfully received.
  • Another alternative embodiment of the invention may comprise a method implemented on the receiving side of a broadcast link (e.g., in a mobile station). In this embodiment, the method comprises receiving segments of broadcast content wherein each segment has an associated sequential segment identifier, receiving an identifier of a data source from which segments that are not successfully received can be retrieved, examining the segment identifiers associated with the received segments, determining whether any of the segments were not successfully received, and retrieving from the identified data source any segments that were not successfully received.
  • Yet another alternative embodiment comprises a transceiver system that is configured to perform one of the methods described above. The transceiver system serves as either a base station or a mobile station, as appropriate for the corresponding method. The system includes a transceiver subsystem for receiving and transmitting data, and a processor for processing the data and controlling the operation of the transceiver subsystem in accordance with the corresponding method. It should be noted that the operation of the transceiver system is controlled in large part by the programming of the processor. The software, firmware or other type of program instructions that are executed by the processor to control the operation of the transceiver system are therefore also considered to comprise alternative embodiments of the invention.
  • Numerous additional embodiments are also possible.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • Various aspects and features of the invention are disclosed by the following detailed description and the references to the accompanying drawings, wherein:
  • FIG. 1 is a diagram illustrating the structure of an exemplary wireless communications system in accordance with one embodiment;
  • FIG. 2 is a functional block diagram illustrating the basic structural components of a wireless transceiver system in accordance with one embodiment;
  • FIG. 3 is a flow diagram illustrating a method in accordance with an exemplary embodiment of the invention;
  • FIG. 4 is a flow diagram illustrating a method in accordance with an alternative embodiment of the invention; and
  • FIG. 5 is a flow diagram illustrating a method in accordance with another alternative embodiment of the invention.
  • While the invention is subject to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and the accompanying detailed description. It should be understood, however, that the drawings and detailed description are not intended to limit the invention to the particular embodiments which are described.
  • DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT
  • One or more embodiments of the invention are described below. It should be noted that these and any other embodiments described below are exemplary and are intended to be illustrative of the invention rather than limiting.
  • As described herein, various embodiments of the invention comprise systems and methods for reliably broadcasting content to a plurality of users and facilitating distribution of portions of the broadcast content that were not received by particular users, or which were received with errors.
  • In one embodiment, a wireless communication system is configured to broadcast content from a content source to a plurality of user devices. The content source is configured to provide the content in a plurality of segments and to provide sequential identifiers associated with each of the segments. The content is then transmitted to each of the user devices via a broadcast channel of the wireless communication system.
  • Because the quality of transmissions on the broadcast channel is subject to atmospheric conditions, fading characteristics of the user devices and the like, errors may occur in the transmission of the broadcast content. Consequently, some of the segments may not be received by one or more of the user devices, or the received segments may contain errors. The particular segments which are missing, or which contain errors, may vary from one user device to another. The system therefore provides to each of the users an identifier of a web site or other source from which segments can be retrieved to replace those that were missing from the broadcast, or which were received with errors. Each user can individually request particular segments of the broadcast content from the identified source without requiring that these segments be re-broadcast to all of the users.
  • Thus, one embodiment of the invention comprises a method implemented in this system, wherein the base station receives broadcast content from a data source, breaks the content down into segments, associates sequence identifiers with the segments, and transmits the segments to one or more mobile stations along with an identifier of a source from which unsuccessfully received segments can be requested. The mobile stations are configured to receive the segments, examine the sequence identifiers associated with the segments, identify unsuccessfully received segments, and request these segments from the source identified by the broadcast station.
  • The various embodiments of the invention may provide a number of advantages over the prior art. For example, in some embodiments, because segments of the broadcast data which are missing or which contain errors are retrieved from a data source separate from the broadcast content source, the broadcast content source does not need to have the capability of retrieving individual segments and transmitting them to users in response to requests for this data. The performance of the broadcast content source may therefore be improved. It may also be advantageous to be able to download particular small segments of the broadcast data rather than having to retransmit large portions or even the entirety of the data. Further, it may be advantageous to be able to deliver requested segments of the broadcast content to individual users, rather than re-broadcasting the requested content to all recipients of the original broadcast. Still further advantages will be apparent to those skills in the art of the invention upon reading the present disclosure.
  • A preferred embodiment of the invention is implemented in a wireless communication system such as a cdma2000 system. Referring to FIG. 1, a diagram illustrating the structure of an exemplary wireless communications system is shown.
  • As depicted in FIG. 1, system 100 comprises a base station 110 that is configured to communicate with a plurality of mobile stations 120. Mobile stations 120 may, for example, be cellular telephones, personal information managers (PIMs or PDA), or the like that are configured for wireless communication. Base station 110 transmits data to mobile stations 120 via corresponding forward link (FL) channels, while mobile stations 120 transmit data to base station 110 via corresponding reverse link (RL) channels.
  • It should be noted that, for the purposes of this disclosure, identical items in the figures may be indicated by identical reference numerals followed by a lowercase letter, e.g., 120 a, 120 b, and so on. The items may be collectively referred to herein simply by the reference numeral.
  • Base station 110 is also coupled to a switching station 130 via a wireline link. The link to switching station 130 allows base station 110 to communicate with various other system components, such as a broadcast server 140, a packet switched data network 150, or a web site 170 via the Internet 160. It should be noted that the mobile stations and system components in this figure are exemplary and other systems may comprise other types and other combinations of devices.
  • While, in practice, the specific designs of base station 110 and mobile stations 120 may vary significantly, each serves as a wireless transceiver for communicating over the forward and reverse links. Base station 110 and mobile stations 120 therefore have the same general structure. This structure is illustrated in FIG. 2.
  • Referring to FIG. 2, a functional block diagram illustrating the basic structural components of a wireless transceiver system in accordance with one embodiment is shown. As depicted in this figure, the system comprises a transmit subsystem 222 and a receive subsystem 224, each of which is coupled to an antenna 226. Transmit subsystem 222 and receive subsystem 224 may be collectively referred to as a transceiver subsystem. Transmit subsystem 222 and receive subsystem 224 access the forward and reverse links through antenna 226. Transmit subsystem 222 and receive subsystem 224 are also coupled to processor 228, which is configured to control transmit and receive subsystems 222 and 224. Memory 230 is coupled to processor 228 to provide working space and local storage for the processor. A data source 232 is coupled to processor 228 to provide data for transmission by the system. Data source 232 May, for example, comprise a microphone or an input from a network device. The data is processed by processor 228 and then forwarded to transmit subsystem 222, which transmits the data via antenna 226. Data received by receive subsystem 224 through antenna 226 is forwarded to processor 228 for processing and then to data output 234 for presentation to a user. Data output 234 may comprise such devices as a speaker, a visual display, or an output to a network device.
  • As mentioned above, the communication link between the base station and the mobile station can be broken down into various channels. These channels include both traffic channels, over which data is transmitted, and control channels, over which control signals are transmitted. Each of the traffic channels generally has one or more control channels associated with it.
  • The communications between the various components of system 100 may comprise transmissions of various different types of data. For instance, system 100 may support voice communications, voice/data communications, or high-speed data communications. Further, the communications may comprise point-to-point transmissions between particular components of the system, or they may comprise multicast or broadcast transmissions from one component to a plurality of components. Generally speaking, broadcast communications are directed from a source component to all destination components in the system, while multicast communications are directed from a source component to a subset of the possible destination components. It should be noted, however, that for the purposes of this disclosure, the term “broadcast” will be used to refer to both broadcast and multicast communications.
  • As indicated above, in one embodiment, system 100 comprises a cdma2000 system. In this embodiment, system 100 provides various types of communication capabilities between base station 110 and mobile stations 120. For example, system 100 may provide point-to-point high-speed communications via a Forward Supplemental Channel (F-SCH). This channel is defined between base station 110 and an individual mobile station 120 using data rates up to 307 kbs. Low-speed data may be communicated through the F-SCH, through a Forward Fundamental Channel (F-FCH) or through a Forward Dedicated Control Channel (F-DCCH) which is assigned to a particular mobile station.
  • In addition to point-to-point communications, each mobile station can receive broadcast communications. Messages intended for multiple recipients may, for example, be transmitted over a forward broadcast control channel (F-BCCH). This channel is a logical communication channel between base station 110 and mobile stations 120. The messages broadcast over the F-BCCH are generally low-speed data, typically comprising text messages. There are a number of methods for communicating a broadcast message over the F-BCCH. These methods typically involve the mobile station monitoring a predefined frequency, time slot, and/or code (e.g., a Walsh code in CDMA systems) for a page message indicating that a broadcast message directed to the mobile station is available. Instructions for receiving the broadcast message may be transmitted to the mobile station via the forward common control channel (F-CCCH), which is received by each mobile station in system 100.
  • Communication system 100 also has a Forward High-Speed Broadcast Channel (F-HSBCH). This channel can be used to transmit high-speed data, such as Internet Protocol (IP) datagrams. Thus, mobile stations 120 can receive broadcast communications such as streaming audio and video information or large computer files via the F-HSBCH.
  • In one embodiment, high-speed data is transmitted from one or more base stations to multiple mobile stations using the F-HSBCH. Each mobile station may also monitor one or more paging or control channels to receive signaling and instructions from a base station in order to receive point-to-point voice calls, receive high-speed data on a different frequency/time slot/code, receive SMS or other low speed group messages, and so on. For example, a mobile station may monitor a forward paging channel (F-PCH), F-BCCH or F-CCCH for such information. In another embodiment, this information is received by monitoring a F-DCCH, which is a signaling channel used to transmit information to mobile stations on an individual basis.
  • The mobile stations may transmit data back to the base station over a number of reverse link channels. For example, in a cdma2000A-compliant system, data may be transmitted over a reverse access channel (R-ACH), an extended reverse access channel (R-EACH), a reverse dedicated control channel (R-DCCH), or a reverse common control channel (R-CCCH).
  • As noted above, data may be broadcast to multiple mobile stations at the same time. Broadcasts of data may be useful in a number of situations. For instance, if it is necessary to distribute program code comprising a software update to a group of mobile stations, it may be convenient to broadcast the software to all of the mobile stations at once. It may also be desirable to provide news or entertainment services (e.g., streams of audio and/or video data) to multiple mobile stations. This data may be viewed in real-time (or near-real-time), or it may be stored for later use by the users of the mobile stations.
  • As also indicated above, one of the problems with broadcasting data to a group of users (e.g., mobile stations) is that there may be errors in the transmission of the broadcast data. The users may therefore successfully receive a portion of the broadcast data, but some portion of the received data may contain errors. Alternatively, some of the data may not be received at all.
  • In some situations, not receiving some of the data, or receiving data that contains errors, is not critical. For example, if the broadcast comprises current news headlines or weather information that is periodically repeated, missing or incorrectly received data may cause minor viewing/listening errors, but the information will be repeated, so it is likely that the data will be correctly transmitted when the transmission is repeated. Alternatively, the broadcast may comprise streaming video or audio, in which a few missing frames of data will not cause a significant problem. On the other hand, there may be situations in which errors or missing portions of the data simply cannot be tolerated. For example, if the broadcast data comprises a software update that is being transmitted to multiple users, it is necessary for each user to successfully receive all of the data. If any portion of the software update is missing, the software will not function correctly. In these situations, it is necessary to provide some means for obtaining the data that was not successfully received.
  • Embodiments of the present invention are directed to resolving such problems. Referring to FIG. 3, a flow diagram illustrating a method in accordance with an exemplary embodiment of the invention shown. In this embodiment, the method comprises associating sequence identifiers with segments of broadcast content (310), transmitting the segments and associated sequence identifiers to a group of receivers (320), providing to the receivers an identifier of a data source from which the segments of the broadcast content can be individually retrieved (330), examining the sequence identifiers of the broadcast content at the receivers to identify missing segments (340), and individually retrieving segments of the broadcast content to particular receivers to replace segments that were not successfully received (350). It should be noted that “retrieving” is used herein to refer to the process of obtaining the segments from the data source, which may simply comprise requesting the segments from the data source and waiting for them to be delivered.
  • It may be useful to refer again to FIG. 1 in relation to this method. In the system of FIG. 1, base station 110 is coupled to broadcast source 140 through switching station 130. Broadcast source 140 provides broadcast content to base station 110. This content is received by base station 110 and formatted for transmission to mobile stations 120. In this embodiment, the process of formatting includes parsing the broadcast content into segments, each of which will be contained in a frame transmitted by base station 110 to mobile stations 120. Each frame contains an identifier of that frame's position in the sequence of frames that are being broadcast. The identifier may, for example, comprise a simple sequence number. In this instance, the first frame which contains a segment of the broadcast content may have sequence number 1, while the next frame has sequence number 2, and so on. Other types of sequence identifiers, such as timestamps, may be used in other embodiments.
  • Base station 110 transmits the frames (containing the segments) to mobile stations 120 over a forward link broadcast channel. Each of mobile stations 120 receives the frames from base station 110 and examines the frames to determine their respective sequence numbers. If any number in the sequence is missing, the mobile station identifies the missing sequence number. For example, if the frames received by a particular mobile station have sequence numbers 1, 2, 3, 5, 6 . . . , the mobile station identifies missing sequence number 4. It should be noted that the mobile stations in this embodiment are also configured to identify any of the received frames which contain errors.
  • When a mobile station 120 identifies a frame that is missing from the received frames, or that contains errors, the mobile station individually requests this frame from the alternative data source specified in connection with the broadcast. For example, if website 170 is identified as the alternative source from which missing or errored frames can be retrieved, the mobile station 120 transmits a request for then needed frame over a reverse link to base station 110, which forwards the request through switching station 130 and Internet 160 to website 170. Responsive to the request, website 170 would transmit the needed frame through Internet 160 and switching station 130 to base station 110, which would then transmit the frame to the mobile station 120 over one of the forward link channels. It should be noted that a channel other than the broadcast channel would be used in this embodiment.
  • The identification of the data source from which the mobile stations can retrieve missing segments of the broadcast data (the alternative data source) may be provided to the mobile stations in a variety of ways. For example, in a pay-per-view type of scenario, each mobile station signs up to receive a broadcast. At this time, the mobile station may receive an encryption key that is necessary to decode the broadcast data. In the same manner, the mobile station may obtain the identifier of the alternative data source. In another embodiment, the base station may transmit the identifier of the alternative data source as part of the broadcast. In other words, it may be transmitted within a setup message or some other configuration information that is transmitted to the mobile stations at the beginning of the broadcast. Alternatively, the identifier may be transmitted to the mobile stations on a separate forward channel (e.g., a control channel). This transmission could take place at the beginning of the broadcast, periodically throughout the broadcast, or even at the end of the broadcast, although this would cause the mobile stations to have to wait until the end of the broadcast to retrieve missing segments of the broadcast data. The identifier could alternatively be included in the overhead data of one or more of the frames that contain the segments.
  • The form of the alternative data source identifier which is used may vary from one embodiment to another. For instance, in one embodiment, the identifier may comprise the address of a web site corresponding to the data source. In another embodiment, the alternative data source identifier may comprise an IP address. Still other forms may also be possible. While the form of the identifier may be limited by the constraints of a particular implementation, the form is not limited for the purposes of the invention itself.
  • The retrieval of the missing segments of the broadcast may be performed in a number of ways. For example, in one embodiment, the mobile station is configured to automatically initiate the retrieval of a segment of the broadcast data upon determining that the segment is missing (or that the segment contains errors). This may be preferable when the broadcast content comprises a software update. In this situation, each segment is critical, as the software will not function properly in the absence of a portion of the software code (i.e., the missing segment). It is therefore assumed that the user would want to proceed with the retrieval of the needed segments. In other situations, such as the broadcast of audio or video, it may not be critical to have all of the segments of the broadcast data, and the retrieval of missing segments may be presented to the user of the mobile station as an option. In other words, the user may be prompted to decide whether or not to initiate the retrieval of the unsuccessfully received segments. The user may then manually initiate the retrieval of the missing segments in response to the prompt.
  • In addition to the various embodiments of the invention which are described above, numerous alternative embodiments will be apparent to those of skill in the art of the invention. These embodiments may include one or more of the alternative features that are described below. These features are exemplary of the alternative embodiments, and not limiting.
  • In one embodiment, the alternative data source comprises a data server which is completely separate from the broadcast server. This configuration may be necessary when the broadcast content source is a sequential access device (e.g., a tape drive). This configuration may be preferable in other situations as well, since the use of a separate server relieves the broadcast content source from having to service the individual segment requests as well as providing the original broadcast content. There may be instances, however, in which it is acceptable or even preferable to utilize the same source to both provide the original content for broadcast to all of the mobile stations and also serve replacement segments to the individual mobile stations. It should be noted that, if the alternative data source is separate from the broadcast server, it may be necessary or desirable to provide the segments of the broadcast content (and the accompanying sequential identifiers) to the alternative data source prior to or at the time of the broadcast.
  • In the embodiments described above, the broadcast content is provided to the base station by a content source (e.g., source 140 in FIG. 1). It is contemplated that, in a preferred embodiment, the source of the content segments the data and inserts sequential segment identifiers into the segments to enable identification of missing segments. It should be noted, however, that the distribution of the tasks relating to segmenting the data and inserting sequential identifiers may be different in other embodiments. For instance, in some embodiments, the base station itself may perform one or more of these functions. The functions of other system components may be similarly redistributed in alternative embodiments of the invention.
  • The method described above encompasses actions on both the transmitting and receiving sides of the broadcast system. An alternative embodiment of the invention may comprise a method implemented on the transmitting side of the broadcast link (e.g., in the broadcast station). In this embodiment, which is illustrated by the flow diagram of FIG. 4, the method comprises formatting broadcast content into multiple segments (410), associating sequential segment identifiers with each of the segments (420), broadcasting the segments and associated segment identifiers to multiple receivers (430), and providing to the receivers an identifier of a source from which the receivers can retrieve segments of the broadcast that are not successfully received (440).
  • This method can be implemented in a base station that has a structure as illustrated in FIG. 2. The base station includes a transceiver subsystem (i.e., transmit and receive subsystems 222 and 224) and a processor 228 which is coupled to the transceiver subsystem to control receipt of broadcast content from the broadcast content source and transmission of the formatted content to the broadcast recipients. The portion of the method that is implemented in processor 228 is implemented through the programming of the processor. Accordingly, it is contemplated that software, firmware or any other type of program instructions that are used for this purpose and which are configured to perform methods as disclosed herein also comprise embodiments of the present invention.
  • Another alternative embodiment of the invention may comprise a method implemented on the receiving side of broadcast link (e.g., in a mobile station). This embodiment is illustrated by the flow diagram of FIG. 5. In this embodiment, the method comprises receiving segments of broadcast content, wherein each segment has an associated sequential segment identifier (510), receiving an identifier of a data source from which segments that are not successfully received can be retrieved (520), examining the segment identifiers associated with the received segments (530), determining whether any of the segments were not successfully received (540), and retrieving from the identified data source any segments that were not successfully received (550).
  • This method can also be implemented in a system having the structure illustrated in FIG. 2, although the structure is, in this instance, illustrative of a mobile station. The mobile station includes a transceiver subsystem and a processor which are used to implement the method. The transceiver subsystem receives the broadcast content and data source identifier, while the processor performs the examination of the content and determination of whether any of the content is missing. The processor also controls the transceiver subsystem to retrieve any missing segments. Again, any software, firmware or other type of program instructions that are used to control the processor to perform methods as disclosed herein comprise alternative embodiments of the present invention.
  • The embodiments described above focus on the use of a wireless communications system. It should be noted that alternative embodiments need not employ wireless systems, but may be implemented in any broadcast system, including wireline system configurations. For instance, the invention could be implemented in the context of a network-based broadcast. Thus, the base station may receive the content and broadcast the segments to users that are coupled to the base station by hard-wired connections. In such an embodiment, of course, terms such as “base station” and “mobile station” could appropriately be replaced by terms such as “broadcast station” and “receiving station”. Still other alternative embodiments could employ combinations of wireless and wireline communication links. For example, it is possible that a mobile station (or receiving station) could receive broadcast data via a wireless link and perform point-to-point communications to retrieve missing segments from a data source using a wireline connection.
  • The various aspects and features of the present invention have been described above with regard to specific embodiments. As used herein, the terms “comprises,” “comprising,” or any other variations thereof, are intended to be interpreted as non-exclusively including the elements or limitations which follow those terms. Accordingly, a system, method, or other embodiment that comprises a set of elements is not limited to only those elements, and may include other elements not expressly listed or inherent to the claimed embodiment.
  • While the present invention has been described with reference to particular embodiments, it should be understood that the embodiments are illustrative and that the scope of the invention is not limited to these embodiments. Many variations, modifications, additions and improvements to the embodiments described above are possible. It is contemplated that these variations, modifications, additions and improvements fall within the scope of the invention as detailed within the following claims.

Claims (68)

1. A method comprising:
formatting broadcast content into a plurality of segments;
associating a sequential segment identifier with each of the segments;
broadcasting the segments and associated segment identifiers to a plurality of receivers;
communicating, in association with the broadcast content, to the receivers an identifier of a data source from which the receivers retrieve unsuccessfully received broadcasted segments.
2. The method as recited in claim 1 further comprising:
examining the segment identifier associated with each received segment;
determining whether any of the segments are unsuccessfully received;
retrieving unsuccessfully received segments from the identified data source.
3. The method as recited in claim 1 wherein the broadcasting to the receivers is via a wireless communication link.
4. The method as recited in claim 1 wherein the communicating the identifier of the data source is via a wireless link.
5. The method as recited in claim 1 wherein the broadcasting to the receivers and the communicating the identifier of the data source is via a common wireless link.
6. The method as recited in claim 1 wherein the retrieving unsuccessfully received segments from the identified data source is via a wireless communication link.
7. The method as recited in claim 1 wherein the broadcasting to the receivers and communicating the identifier of the data source is via a common wireless link, and wherein the retrieving unsuccessfully received segments from the identified data source is via another wireless link.
8. The method as recited in claim 1 wherein the sequential segment identifiers comprise a series of sequential numbers.
9. The method as recited in claim 1 wherein the sequential segment identifiers comprise a series of transmission timestamps.
10. The method as recited in claim 1 further comprising:
operating the data source identified by the data source identifier in association with operating a broadcast content source for broadcasting the broadcast content for the receivers.
11. The method as recited in claim 1 further comprising:
operating the data source identified by the data source identifier independent of operating a broadcast content source for broadcasting the broadcast content for the receivers.
12. The method as recited in claim 1 wherein the data source identifier identifies an internet web site.
13. The method as recited in claim 1 wherein the broadcast content includes at least one of a program code, multi media content, audio content and video content.
14. The method as recited in claim 2 wherein the retrieving includes automatically transmitting a request to the identified data source for retrieving the unsuccessfully received segments.
15. The method as recited in claim 2 wherein the retrieving includes prompting a user of a unsuccessfully received segment, initiating transmission of a request for retrieving the unsuccessfully received segment, and transmitting the request to the identified data source.
16. The method as recited in claim 2 wherein the retrieving includes receiving the unsuccessfully received segment from the identified data source.
17. The method as recited in claim 2 wherein the retrieving includes transmitting the unsuccessfully received segments from the identified data source.
18. A method comprising:
receiving broadcast content comprising a plurality of segments including a sequential segment identifier for identifying each of the segments;
receiving a data source identifier for identifying a data source for retrieving unsuccessfully received segments.
19. The method as recited in claim 18 further comprising:
examining the segment identifier associated with each received segment;
determining whether any of the segments are unsuccessfully received;
retrieving unsuccessfully received segments from the data source identified by the data source identifier.
20. The method as recited in claim 18 wherein the receiving of the broadcast content is via a wireless communication link.
21. The method as recited in claim 18 wherein the receiving of the data source identifier for identifying the data source is via a wireless communication link.
22. The method as recited in claim 18 wherein the receiving of the broadcast content and the receiving of the data source identifier for identifying the data source is via a common wireless communication link.
23. The method as recited in claim 19 wherein the retrieving unsuccessfully received segments from the data source is via a wireless communication link.
24. The method as recited in claim 19 wherein the receiving of the data source identifier for identifying the data source is via a wireless communication link and the retrieving unsuccessfully received segments from the data source is via another wireless communication link.
25. The method as recited in claim 19 wherein the receiving of the broadcast content and the receiving of the data source identifier for identifying the data source is via a common wireless communication link and the retrieving unsuccessfully received segments from the data source is via another wireless communication link.
26. The method as recited in claim 18 wherein the sequential segment identifiers comprise a series of sequential numbers.
27. The method as recited in claim 18 wherein the sequential segment identifiers comprise a series of timestamps.
28. The method as recited in claim 18 further comprising:
operating the data source identified by the data source identifier in association with operating a broadcast content source for broadcasting the broadcast content for the receivers.
29. The method as recited in claim 18 further comprising:
operating the data source identified by the data source identifier independent of operating a broadcast content source for broadcasting the broadcast content for the receivers.
30. The method of claim 18 wherein the data source identifier identifies an internet web site.
31. The method of claim 18 wherein the broadcast content includes at least one of a program code, multi media content, audio content and video content
32. The method as recited in claim 19 wherein the retrieving includes automatically transmitting a request to the identified data source for retrieving the unsuccessfully received segments.
33. The method as recited in claim 19 wherein the retrieving includes prompting a user of a unsuccessfully received segment, initiating transmission of a request for retrieving the unsuccessfully received segment, and transmitting the request to the identified data source.
34. The method as recited in claim 19 wherein the retrieving includes receiving the unsuccessfully received segments from the identified data source.
35. The method as recited in claim 19 wherein the retrieving includes transmitting the unsuccessfully received segments from the identified data source.
36. An apparatus comprising:
means for formatting broadcast content into a plurality of segments;
means for associating a sequential segment identifier with each of the segments;
means for broadcasting the segments and associated segment identifiers to a plurality of receivers;
means for communicating, in association with the broadcast content, to the receivers an identifier of a data source from which the receivers retrieve unsuccessfully received broadcasted segments.
37. The apparatus as recited in claim 36 further comprising:
means for examining the segment identifier associated with each received segment;
means for determining whether any of the segments are unsuccessfully received; and
means for retrieving unsuccessfully received segments from the identified data source.
38. The apparatus as recited in claim 36 wherein the means for broadcasting to the receivers includes means for broadcasting via a wireless communication link.
39. The apparatus as recited in claim 36 wherein the means for communicating the identifier of the data source includes means for communicating via a wireless link.
40. The apparatus as recited in claim 36 wherein the means for retrieving unsuccessfully received segments from the identified data source includes means for retrieving via a wireless communication link.
41. The apparatus as recited in claim 36 further comprising:
means for associated operations of the identified data source and a broadcast content source for the means for broadcasting the broadcast content for the receivers.
42. The apparatus as recited in claim 36 further comprising:
means for independent operations of the identified data source and a broadcast content source for broadcasting the broadcast content for the receivers.
43. The apparatus as recited in claim 37 wherein the means for retrieving includes means for automatically transmitting a request for retrieving the unsuccessfully received segments.
44. The apparatus as recited in claim 37 wherein the means for retrieving includes means for prompting a user of unsuccessful reception of a segment, initiating transmission of a request for retrieving the unsuccessfully received segments, and transmitting the request to the data source.
45. The apparatus as recited in claim 37 wherein the means for retrieving includes means for receiving the unsuccessfully received segments from the data source.
46. The apparatus as recited in claim 37 wherein the means for retrieving includes means for transmitting the unsuccessfully received segments from the data source.
47. An apparatus comprising:
means for receiving broadcast content comprising a plurality of segments including a sequential segment identifier for identifying each of the segments;
means for receiving a data source identifier for identifying a data source for retrieving unsuccessfully received segments.
48. The apparatus as recited in claim 47 further comprising:
means for examining the segment identifier associated with each received segment;
means for determining whether any of the segments are unsuccessfully received;
means for retrieving unsuccessfully received segments from the data source identified by the data source identifier.
49. The apparatus as recited in claim 47 wherein the means for receiving of the broadcast content includes means for receiving via a wireless communication link.
50. The apparatus as recited in claim 47 wherein the means for receiving of the data source identifier for identifying the data source includes means for receiving via a wireless communication link.
51. The apparatus as recited in claim 47 wherein the means for receiving of the broadcast content and the means for receiving of the data source identifier for identifying the data source include means for receiving via a common wireless communication link.
52. The apparatus as recited in claim 47 wherein the means for retrieving unsuccessfully received segments from the data source includes means for retrieving via a wireless communication link.
53. The apparatus as recited in claim 47 wherein the means for receiving of the data source identifier for identifying the data source includes means for receiving via a wireless communication link and the means for retrieving unsuccessfully received segments from the data source includes means for receiving via another wireless communication link.
54. The apparatus as recited in claim 47 wherein the means for receiving of the broadcast content and the means for receiving of the data source identifier for identifying the data source includes means for receiving via a common wireless communication link and the means for retrieving unsuccessfully received segments from the data source includes means for retrieving via another wireless communication link.
55. The apparatus of claim 47 wherein the means for retrieving includes means for retrieving from an internet web site.
56. The apparatus as recited in claim 47 wherein the means for retrieving includes means for automatically transmitting a request to the identified data source for retrieving the unsuccessfully received segments.
57. The apparatus as recited in claim 47 wherein the means for retrieving includes means for prompting a user of a unsuccessfully received segment, initiating transmission of a request for retrieving the unsuccessfully received segment, and transmitting the request to the identified data source.
58. The apparatus as recited in claim 47 wherein the means for retrieving includes means for receiving the unsuccessfully received segments from the identified data source.
59. The apparatus as recited in claim 47 wherein the means for retrieving includes means for transmitting the unsuccessfully received segments from the identified data source.
60. A method comprising:
broadcasting broadcast content to a plurality of receivers;
communicating, in association with the broadcast content, to the receivers an identifier of a data source from which the receivers retrieve unsuccessfully received broadcasted content.
61. The method as recited in claim 60 further comprising:
retrieving unsuccessfully received broadcasted content from the identified data source.
62. The method as recited in claim 60 wherein the broadcasting to the receivers is via a wireless communication link.
63. The method as recited in claim 60 wherein the communicating the identifier of the data source is via a wireless link.
64. The method as recited in claim 60 wherein the broadcasting to the receivers and the communicating the identifier of the data source is via a common wireless link.
65. The method as recited in claim 60 wherein the retrieving unsuccessfully received segments from the identified data source is via a wireless communication link.
66. The method as recited in claim 60 wherein the broadcasting to the receivers and communicating the identifier of the data source is via a common wireless link, and wherein the retrieving unsuccessfully received broadcasted content from the identified data source is via another wireless link.
67. The method as recited in claim 60 wherein the retrieving includes receiving the unsuccessfully received broadcasted content from the identified data source.
68. The method as recited in claim 60 wherein the retrieving includes transmitting the unsuccessfully received segments from the identified data source.
US11/504,236 2003-05-16 2006-08-14 Reliable reception of broadcast/multicast content Active 2025-01-18 US8463250B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US10/439,594 US7113773B2 (en) 2003-05-16 2003-05-16 Reliable reception of broadcast/multicast content
US11/504,236 US8463250B2 (en) 2003-05-16 2006-08-14 Reliable reception of broadcast/multicast content

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/504,236 US8463250B2 (en) 2003-05-16 2006-08-14 Reliable reception of broadcast/multicast content

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US10/439,594 Continuation US7113773B2 (en) 2003-05-16 2003-05-16 Reliable reception of broadcast/multicast content

Publications (2)

Publication Number Publication Date
US20060276183A1 true US20060276183A1 (en) 2006-12-07
US8463250B2 US8463250B2 (en) 2013-06-11

Family

ID=33417842

Family Applications (2)

Application Number Title Priority Date Filing Date
US10/439,594 Active 2024-05-31 US7113773B2 (en) 2003-05-16 2003-05-16 Reliable reception of broadcast/multicast content
US11/504,236 Active 2025-01-18 US8463250B2 (en) 2003-05-16 2006-08-14 Reliable reception of broadcast/multicast content

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US10/439,594 Active 2024-05-31 US7113773B2 (en) 2003-05-16 2003-05-16 Reliable reception of broadcast/multicast content

Country Status (13)

Country Link
US (2) US7113773B2 (en)
EP (2) EP1971068B1 (en)
JP (2) JP4594315B2 (en)
KR (1) KR101038910B1 (en)
CN (2) CN101873541B (en)
AT (2) AT515901T (en)
BR (1) BRPI0410230B1 (en)
CA (1) CA2525822C (en)
DE (1) DE602004016148D1 (en)
ES (1) ES2366304T3 (en)
MX (1) MXPA05012373A (en)
TW (1) TWI350709B (en)
WO (1) WO2004105300A2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080126222A1 (en) * 2006-02-22 2008-05-29 Huawei Technologies Co., Ltd. Method and device for subscribing purchase item in mobile broadcast multicast service
US20100296512A1 (en) * 2006-06-13 2010-11-25 Aware, Inc. Point-to-Point and Point-to-Multipoint Communications
US20120088457A1 (en) * 2009-06-18 2012-04-12 Huawei Technologies Co., Ltd. Method and Device for Minimizing Drive Test Logging Measurement
US20120295535A1 (en) * 2011-05-18 2012-11-22 Radius Networks, Inc. System and method for delivering content to a wireless station

Families Citing this family (62)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6307487B1 (en) 1998-09-23 2001-10-23 Digital Fountain, Inc. Information additive code generator and decoder for communication systems
US7068729B2 (en) 2001-12-21 2006-06-27 Digital Fountain, Inc. Multi-stage code generator and decoder for communication systems
US9419749B2 (en) 2009-08-19 2016-08-16 Qualcomm Incorporated Methods and apparatus employing FEC codes with permanent inactivation of symbols for encoding and decoding processes
US9288010B2 (en) 2009-08-19 2016-03-15 Qualcomm Incorporated Universal file delivery methods for providing unequal error protection and bundled file delivery services
US9240810B2 (en) 2002-06-11 2016-01-19 Digital Fountain, Inc. Systems and processes for decoding chain reaction codes through inactivation
KR101143282B1 (en) 2002-10-05 2012-05-08 디지털 파운튼, 인크. Systematic encoding and decoding of chain reaction codes
US7113773B2 (en) 2003-05-16 2006-09-26 Qualcomm Incorporated Reliable reception of broadcast/multicast content
CN101834610B (en) 2003-10-06 2013-01-30 数字方敦股份有限公司 Method and device for receiving data transmitted from source through communication channel
KR101161193B1 (en) 2004-05-07 2012-07-02 디지털 파운튼, 인크. File download and streaming system
US20050278766A1 (en) * 2004-05-27 2005-12-15 Benco David S Wireless support for TV pay-per-view ordering
US7450603B2 (en) * 2004-08-31 2008-11-11 General Motors Corporation System and methods of wireless vehicle to vehicle data sharing
US7724656B2 (en) * 2005-01-14 2010-05-25 Telefonaktiebolaget Lm Ericsson (Publ) Uplink congestion detection and control between nodes in a radio access network
US9432433B2 (en) 2006-06-09 2016-08-30 Qualcomm Incorporated Enhanced block-request streaming system using signaling or block creation
US9380096B2 (en) 2006-06-09 2016-06-28 Qualcomm Incorporated Enhanced block-request streaming system for handling low-latency streaming
US9386064B2 (en) 2006-06-09 2016-07-05 Qualcomm Incorporated Enhanced block-request streaming using URL templates and construction rules
US9209934B2 (en) 2006-06-09 2015-12-08 Qualcomm Incorporated Enhanced block-request streaming using cooperative parallel HTTP and forward error correction
US9178535B2 (en) 2006-06-09 2015-11-03 Digital Fountain, Inc. Dynamic stream interleaving and sub-stream based delivery
US8412191B2 (en) 2005-09-29 2013-04-02 Qualcomm Incorporated Cellular telephone service management
US8200187B2 (en) 2005-09-29 2012-06-12 Qualcomm Incorporated Cellular telephone credit management
US9136983B2 (en) 2006-02-13 2015-09-15 Digital Fountain, Inc. Streaming and buffering using variable FEC overhead and protection periods
US9270414B2 (en) 2006-02-21 2016-02-23 Digital Fountain, Inc. Multiple-field based code generator and decoder for communications systems
WO2007134196A2 (en) 2006-05-10 2007-11-22 Digital Fountain, Inc. Code generator and decoder using hybrid codes
US8488508B2 (en) * 2006-11-13 2013-07-16 Qualcomm Incorporated Method and apparatus for providing reliable multicast in a wireless communication system
KR20080101615A (en) * 2007-05-15 2008-11-21 삼성전자주식회사 Apparatus and method for providing content for broadcast service in mobile communication system
WO2008140274A1 (en) * 2007-05-15 2008-11-20 Samsung Electronics Co., Ltd. Apparatus and method for transmitting/receiving content in a mobile communication system
CN101312384B (en) 2007-05-24 2012-05-23 上海贝尔阿尔卡特股份有限公司 Method and apparatus for computing even-odd check information in communication network
MX2010002829A (en) 2007-09-12 2010-04-01 Digital Fountain Inc Generating and communicating source identification information to enable reliable communications.
US8046453B2 (en) * 2007-09-20 2011-10-25 Qurio Holdings, Inc. Illustration supported P2P media content streaming
US8917646B2 (en) * 2007-10-19 2014-12-23 International Business Machines Corporation Detecting and processing corrupted video recordings
US8244102B2 (en) 2007-10-19 2012-08-14 Internationa Business Machines Corporation Detecting and processing corrupted video recordings
US8346218B2 (en) 2008-05-02 2013-01-01 International Business Machines Corporation Avoiding redundant transmissions of data during multimedia mobile phone communications
US20100104258A1 (en) 2008-10-28 2010-04-29 International Business Machines Corporation User-specified event-based remote triggering of a consumer digital video recording device
US8233530B2 (en) * 2008-10-28 2012-07-31 International Business Machines Corporation Video scene matching on return from virtual rendering in a consumer digital video recording device
TWI370642B (en) 2008-12-16 2012-08-11 Ind Tech Res Inst Multicast communication method, and relay node and wireless network system using the same
US8218939B2 (en) * 2009-01-14 2012-07-10 International Business Machines Corporation Intelligent synchronization of portable video devices
US8195035B2 (en) * 2009-02-06 2012-06-05 International Business Machines Corporation Link-based DVR scheduling with conflict resolution
US9245583B2 (en) * 2009-02-06 2016-01-26 International Business Machines Corporation Group control and messaging for digital video playback sessions
US8428421B2 (en) * 2009-02-06 2013-04-23 International Business Machines Corporation Playback of damaged video media using downloaded content
US9281847B2 (en) 2009-02-27 2016-03-08 Qualcomm Incorporated Mobile reception of digital video broadcasting—terrestrial services
US8391680B2 (en) * 2009-03-20 2013-03-05 International Business Machines Corporation Genre-based video quota management
CN101873534B (en) 2009-04-27 2013-07-31 电信科学技术研究院 Compensating method, system and device for receiving of multimedia broadcasting and multicast service (MBMS)
US9917874B2 (en) 2009-09-22 2018-03-13 Qualcomm Incorporated Enhanced block-request streaming using block partitioning or request controls for improved client-side handling
US20110280311A1 (en) 2010-05-13 2011-11-17 Qualcomm Incorporated One-stream coding for asymmetric stereo video
US9485546B2 (en) 2010-06-29 2016-11-01 Qualcomm Incorporated Signaling video samples for trick mode video representations
US8918533B2 (en) 2010-07-13 2014-12-23 Qualcomm Incorporated Video switching for streaming video data
US9185439B2 (en) 2010-07-15 2015-11-10 Qualcomm Incorporated Signaling data for multiplexing video components
US9596447B2 (en) 2010-07-21 2017-03-14 Qualcomm Incorporated Providing frame packing type information for video coding
US8806050B2 (en) 2010-08-10 2014-08-12 Qualcomm Incorporated Manifest file updates for network streaming of coded multimedia data
US20120151367A1 (en) * 2010-12-10 2012-06-14 Nokia Corporation Method and apparatus for registering a content provider channel for recommendation of content segments
US9270299B2 (en) 2011-02-11 2016-02-23 Qualcomm Incorporated Encoding and decoding using elastic codes with flexible source block mapping
US8958375B2 (en) 2011-02-11 2015-02-17 Qualcomm Incorporated Framing for an improved radio link protocol including FEC
US8605640B2 (en) * 2011-05-26 2013-12-10 Verizon Patent And Licensing Inc. Network aware content pre-delivery over a radio access network
US9253233B2 (en) 2011-08-31 2016-02-02 Qualcomm Incorporated Switch signaling methods providing improved switching between representations for adaptive HTTP streaming
US9843844B2 (en) 2011-10-05 2017-12-12 Qualcomm Incorporated Network streaming of media data
US9294226B2 (en) 2012-03-26 2016-03-22 Qualcomm Incorporated Universal object delivery and template-based file delivery
US20140351182A1 (en) * 2013-05-24 2014-11-27 Qualcomm Incorporated Modifying Learning Capabilities of Learning Devices
US9747554B2 (en) 2013-05-24 2017-08-29 Qualcomm Incorporated Learning device with continuous configuration capability
US9679491B2 (en) * 2013-05-24 2017-06-13 Qualcomm Incorporated Signaling device for teaching learning devices
CN103763018B (en) * 2014-01-17 2017-02-08 航天数字传媒有限公司 A satellite data reception method of a user terminal
EP3120620B1 (en) * 2014-03-21 2018-12-12 Telefonaktiebolaget LM Ericsson (publ) Techniques for providing wlan identifier lists to terminal devices
WO2016011591A1 (en) 2014-07-21 2016-01-28 Motorola Solutions, Inc. Method and apparatus for subgroup call to group members missing a group call
CN105471825A (en) * 2014-09-03 2016-04-06 中兴通讯股份有限公司 Method and device for identifying lost data message

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020032324A1 (en) * 1994-02-07 2002-03-14 Qiagen Gmbh Process for the preparation of endotoxin-free or endotoxin-depleted nucleic acids and/or oligonucleotides for gene therapy
US20020196760A1 (en) * 2001-05-30 2002-12-26 Szabolcs Malomsoky Handling TCP protocol for connections transmitted in parallel over radio link
US20030026240A1 (en) * 2001-07-23 2003-02-06 Eyuboglu M. Vedat Broadcasting and multicasting in wireless communication
US20030142726A1 (en) * 2002-01-25 2003-07-31 Innovlcs Corporation Universal rake receiver
US6724746B1 (en) * 1999-03-12 2004-04-20 Telefonaktiebolaget Lm Ericsson Packet communication system and a method related to such a system
US20040205071A1 (en) * 2001-05-03 2004-10-14 Akio Uesugi File distribution system, file delivery server apparatus, and reception client apparatus
US6810070B1 (en) * 2000-01-12 2004-10-26 Ericsson Inc. Selective multi-carrier direct sequence spread spectrum communication systems and methods
US20090268567A1 (en) * 2000-10-25 2009-10-29 Marko Paul D Method and apparatus for employing stored content at receivers to improve efficiency of broadcast system bandwidth use

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5978381A (en) * 1997-06-06 1999-11-02 Webtv Networks, Inc. Transmitting high bandwidth network content on a low bandwidth communications channel during off peak hours
BR9911260A (en) 1998-06-15 2001-03-13 Ericsson Telefon Ab L M Process for providing an information service to said mobile station in a radio communication system having a radio broadcasting, mobile station, and radio communication system
JP2001053699A (en) 1999-08-11 2001-02-23 Hitachi Ltd Digital broadcasting system, mobile body terminal, and information service station
JP2001274746A (en) 2000-03-24 2001-10-05 Nec Mobile Commun Ltd Simultaneous multiple address distribution system and information acquisition method
JP3889919B2 (en) 2000-08-31 2007-03-07 株式会社日立製作所 Information distribution method, an information receiving method, information distribution system, information distribution apparatus, receiving terminal, and a storage medium
JP4622070B2 (en) 2000-09-13 2011-02-02 株式会社デンソー Adaptive communication system, communication terminal, and a recording medium
US7061896B2 (en) * 2000-09-20 2006-06-13 George Mason Intellectual Properties, Inc. Wireless label switched packet transfer network
US20020095636A1 (en) 2000-11-06 2002-07-18 Hidenori Tatsumi Transmitter, receiver and broadcast data delivering method
JP2002237813A (en) 2001-02-09 2002-08-23 Mobile Contents Fund:Kk Information downloading system and data communication terminal
KR20030004618A (en) * 2001-07-05 2003-01-15 삼성전자 주식회사 Apparatus and method for retransmitting packet data in high speed downlink packet access system
JP4520671B2 (en) * 2001-08-07 2010-08-11 ソフトバンクモバイル株式会社 Download System
JP2003134064A (en) 2001-10-26 2003-05-09 Hitachi Ltd Digital broadcast complementing method and digital broadcast reception system
US20030125035A1 (en) * 2001-12-19 2003-07-03 Khafizov Farid T. Burst scheduling in a wireless communication system
US7266130B2 (en) * 2001-12-28 2007-09-04 Samsung Electronics Co., Ltd. Apparatus and method for multiplexing multiple end-to-end transmission links in a communication system
US7113773B2 (en) 2003-05-16 2006-09-26 Qualcomm Incorporated Reliable reception of broadcast/multicast content

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020032324A1 (en) * 1994-02-07 2002-03-14 Qiagen Gmbh Process for the preparation of endotoxin-free or endotoxin-depleted nucleic acids and/or oligonucleotides for gene therapy
US6724746B1 (en) * 1999-03-12 2004-04-20 Telefonaktiebolaget Lm Ericsson Packet communication system and a method related to such a system
US6810070B1 (en) * 2000-01-12 2004-10-26 Ericsson Inc. Selective multi-carrier direct sequence spread spectrum communication systems and methods
US20090268567A1 (en) * 2000-10-25 2009-10-29 Marko Paul D Method and apparatus for employing stored content at receivers to improve efficiency of broadcast system bandwidth use
US20040205071A1 (en) * 2001-05-03 2004-10-14 Akio Uesugi File distribution system, file delivery server apparatus, and reception client apparatus
US20020196760A1 (en) * 2001-05-30 2002-12-26 Szabolcs Malomsoky Handling TCP protocol for connections transmitted in parallel over radio link
US20030026240A1 (en) * 2001-07-23 2003-02-06 Eyuboglu M. Vedat Broadcasting and multicasting in wireless communication
US20030142726A1 (en) * 2002-01-25 2003-07-31 Innovlcs Corporation Universal rake receiver

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080126222A1 (en) * 2006-02-22 2008-05-29 Huawei Technologies Co., Ltd. Method and device for subscribing purchase item in mobile broadcast multicast service
US7979317B2 (en) 2006-02-22 2011-07-12 Huawei Technologies Co., Ltd. Method and system for subscribing a purchase item in mobile broadcast multicast service
US20100296512A1 (en) * 2006-06-13 2010-11-25 Aware, Inc. Point-to-Point and Point-to-Multipoint Communications
US20120088457A1 (en) * 2009-06-18 2012-04-12 Huawei Technologies Co., Ltd. Method and Device for Minimizing Drive Test Logging Measurement
US9973954B2 (en) * 2009-06-18 2018-05-15 Huawei Technologies Co., Ltd. Method and device for minimizing drive test logging measurement
WO2012159054A3 (en) * 2011-05-18 2013-01-17 Radius Networks, Inc. A system and method for delivering content to a wireless station
EP2712487A2 (en) * 2011-05-18 2014-04-02 Radius Networks, Inc. A system and method for delivering content to a wireless station
EP2712487A4 (en) * 2011-05-18 2014-11-19 Radius Networks Inc A system and method for delivering content to a wireless station
US8938196B2 (en) * 2011-05-18 2015-01-20 Radius Networks Inc. System and method for delivering content to a wireless station
US9167443B2 (en) 2011-05-18 2015-10-20 Radius Networks, Inc. System and method for managing content exchanges in a wireless network using a listener module
US20120295535A1 (en) * 2011-05-18 2012-11-22 Radius Networks, Inc. System and method for delivering content to a wireless station
US10212647B2 (en) 2011-05-18 2019-02-19 Radius Networks Inc. System and method for managing content exchanges in a wireless network using a listener module

Also Published As

Publication number Publication date
EP1625684B1 (en) 2008-08-27
CN1792056B (en) 2010-09-08
US8463250B2 (en) 2013-06-11
TWI350709B (en) 2011-10-11
JP2010268455A (en) 2010-11-25
JP2007503793A (en) 2007-02-22
AT515901T (en) 2011-07-15
CA2525822A1 (en) 2004-12-02
AT406724T (en) 2008-09-15
US20040229599A1 (en) 2004-11-18
TW200509722A (en) 2005-03-01
BRPI0410230A (en) 2006-05-09
MXPA05012373A (en) 2006-02-02
CN1792056A (en) 2006-06-21
CA2525822C (en) 2014-07-22
KR20060018853A (en) 2006-03-02
EP1971068A1 (en) 2008-09-17
ES2366304T3 (en) 2011-10-19
KR101038910B1 (en) 2011-06-03
JP4594315B2 (en) 2010-12-08
JP5016084B2 (en) 2012-09-05
US7113773B2 (en) 2006-09-26
CN101873541A (en) 2010-10-27
CN101873541B (en) 2013-03-13
BRPI0410230B1 (en) 2018-04-17
EP1625684A2 (en) 2006-02-15
EP1971068B1 (en) 2011-07-06
WO2004105300A3 (en) 2005-03-03
DE602004016148D1 (en) 2008-10-09
WO2004105300A2 (en) 2004-12-02

Similar Documents

Publication Publication Date Title
EP1460791B1 (en) Transmission methods for communication systems supporting a multicast mode
JP3763741B2 (en) Packet discard notification for semi reliability retransmission protocol
JP4842480B2 (en) Improved wireless communication line protocol to reduce the setting time of the data calls
US8359349B2 (en) System and associated terminal, method and computer program product for uploading content
EP1695462B1 (en) Transmitting and receiving control protocol data unit having processing time information
KR101168382B1 (en) Feedback signalling for multicast data transmission
CA2458316C (en) Radio resource control-service data unit reception
US7123617B1 (en) Radio link protocol enhancements for dynamic capacity wireless data channels
ES2372309T3 (en) Method and apparatus for the efficient retransmission of data in voice communication over data.
RU2316123C2 (en) Efficient multi-address broadcasting transmission for packet data systems
US6839007B2 (en) Inner coding of higher priority data within a digital message
CA2395615C (en) Method for making data transmission more effective and a data transmission protocol
CN1951052B (en) Apparatus and method for enhanced um rlc data handling
JP4303197B2 (en) How to control the flow of data in a communication system and device
US6307867B1 (en) Data transmission over a communications link with variable transmission rates
US7542438B2 (en) Reliable multicast data retransmission method by grouping wireless terminals in wireless communication medium and apparatus for the same
US6781972B1 (en) Method and system for subscriber-configurable communications service
EP1811727A2 (en) Method and apparatus for transmitting a status report for retransmission control in a mobile communication system
US8089940B2 (en) Method and system for efficient and reliable data packet transmission
EP1555774B1 (en) Data receiving apparatus and data receiving method
US6677864B2 (en) Method for multicast over wireless networks
US6373842B1 (en) Unidirectional streaming services in wireless systems
JP5562930B2 (en) Forward error correction of the multiplexed cdma channel that enables high performance coding
US7013157B1 (en) Method for multicast delivery with designated acknowledgment
KR100855386B1 (en) Identification and re-transmission of missing parts

Legal Events

Date Code Title Description
AS Assignment

Owner name: QUALCOMM INCORPORATED, CALIFORNIA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:QUICK, ROY FRANKLIN, JR.;HSU, RAYMOND T.;CANOY, MICHAEL-DAVID NAKAYOSHI;REEL/FRAME:030403/0322

Effective date: 20030917

STCF Information on status: patent grant

Free format text: PATENTED CASE

FPAY Fee payment

Year of fee payment: 4